Cita APA (7a ed.)

Hough, B. O. (1920). Ocean traffic and trade. Lasalle Extension University.

Cita Chicago Style (17a ed.)

Hough, Benjamin Olney. Ocean Traffic and Trade. Chicago: Lasalle Extension University, 1920.

Cita MLA (8a ed.)

Hough, Benjamin Olney. Ocean Traffic and Trade. Lasalle Extension University, 1920.