APA (7th ed.) Citation

Harper, C. P. (1929). Philippine trade in phonographs and records. [publisher not identified].

Chicago Style (17th ed.) Citation

Harper, Clarence P. Philippine Trade in Phonographs and Records. Washington, D.C.: [publisher not identified], 1929.

MLA (9th ed.) Citation

Harper, Clarence P. Philippine Trade in Phonographs and Records. [publisher not identified], 1929.