APA (7th ed.) Citation

Yerby, W. J. (1928). Demand for phonographs in northern Portugal. [publisher not identified].

Chicago Style (17th ed.) Citation

Yerby, William J. Demand for Phonographs in Northern Portugal. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Yerby, William J. Demand for Phonographs in Northern Portugal. [publisher not identified], 1928.

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