How do I reference a lecture both in text and on the reference page. Also, would an 'an' be used befor the abbreviations LPN and RN?

For question 1, according to MLA, reference a lecture as follows:

Speaker's Last name, First name and Initial. "Title of the presentation (if known)." The meeting title (if given). The sponsoring organization (if given). Location. Day, Month, Year.

example:

Atwood, Margaret. "Silencing the Scream." Boundaries of the Imagination Forum. MLA Convention. Royal York Hotel, Toronto. 29 Dec. 1993.

For question 2, the answer is "yes".

Thank you!

To reference a lecture both in text and on the reference page, you should follow the guidelines provided by the citation style you are using, such as MLA or APA. Since you mentioned MLA, here is an example of how to reference a lecture in MLA format:

In-text citation: (Speaker's Last name)

Reference page citation:
Speaker's Last name, First name and Initial. "Title of the presentation (if known)." The meeting title (if given). The sponsoring organization (if given). Location. Day, Month, Year.

For example, if Margaret Atwood gave a lecture titled "Silencing the Scream" at the Boundaries of the Imagination Forum, as part of the MLA Convention, held at the Royal York Hotel in Toronto on December 29, 1993, the citation would be:

Atwood, Margaret. "Silencing the Scream." Boundaries of the Imagination Forum. MLA Convention. Royal York Hotel, Toronto. 29 Dec. 1993.

Regarding the use of "an" before the abbreviations LPN and RN, "an" is used before vowel sounds. Since "LPN" starts with a vowel sound (the letter 'ell'), you would use "an LPN." However, "RN" starts with a consonant sound (the letter 'ar'), so you would use "a RN."

I hope this helps!