APA (7th ed.) Citation

Heyl, P. R. (1926). Architectural acoustics. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Heyl, Paul R. Architectural Acoustics. [Washington?]: U.S. Government Printing Office, 1926.

MLA (9th ed.) Citation

Heyl, Paul R. Architectural Acoustics. U.S. Government Printing Office, 1926.

Warning: These citations may not always be 100% accurate.