Which of the following reference list entries represent a published book?
A. Das, A., Bonneau, J., Caesar, M., Borisov, N., & Wang, X. 2014. The Tangled Web of Password Reuse. Journal of Economy, 14(2):23-26.
B. Hefer, E. 2011. Reading second language subtitles: a case study of South African viewers reading in their native language and L2-English. Vanderbijlpark: North-West University. (Thesis: PhD).
C. Haapalainen, E., Kim, S., Forlizzi, J.F. & Dey, A.K. 2010. Psycho-physiological measures for assessing cognitive load. Paper delivered at the 12th ACM International Conference on Ubiquitous Computing, Cape Town.
D. Bonneau, J. & Oorschot, P.C. 2015. Passwords and the evolution of imperfect authentication. 5th ed. Lexington: McGraw-Hill.