APA Style

Reclamation, U, D, O, T, I, B, O. (1941). Boulder Dam Part IV - Design and Construction Bulletin 2 . Denver: United States Department of The Interior.

MLA Style

Reclamation, U.S., Department, Of, The, Interior, Bureau, Of. "Boulder Dam Part IV - Design and Construction Bulletin 2". Denver: United States Department of The Interior, 1941. Text.