I need help with correctly punctuating this sentence. I am not sure where the period goes. Should it be inside or outside the parenthesis in this sentence? The textbook had recently been revised. (The last revision took place in 1992). Thank you

This site will give you examples.
http://www.iolani.honolulu.hi.us/Keables/KeablesGuide/PartFour/TitlesEndPunctDashesParen.htm#paren1

To correctly punctuate the sentence, the period should be placed outside of the parentheses. The sentence should look like this:

The textbook had recently been revised (the last revision took place in 1992).

The general rule for punctuating sentences with parentheses is that if the information inside the parentheses is a complete sentence, the period goes inside the closing parenthesis. However, if the information inside the parentheses is not a complete sentence, the period goes outside the closing parenthesis. In this case, "The textbook had recently been revised" is a complete sentence, and "(The last revision took place in 1992)" is additional information. Therefore, the period goes outside the closing parenthesis.

If you need further examples or information on punctuating sentences with parentheses, you can visit the website you provided: http://www.iolani.honolulu.hi.us/Keables/KeablesGuide/PartFour/TitlesEndPunctDashesParen.htm#paren1. This site will provide you with more examples and guidelines to help you with punctuation.