APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.