APA (7e ed.) Bronvermelding

Modley, R. (1952). Pictographs and graphs: How to make and use them. Harper.

Chicago (17e ed.) Bronvermelding

Modley, Rudolf. Pictographs and Graphs: How to Make and Use Them. New York: Harper, 1952.

MLA (9e ed.) Bronvermelding

Modley, Rudolf. Pictographs and Graphs: How to Make and Use Them. Harper, 1952.

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