Pictographs and graphs; : how to make and use them,

MLA

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

APA

Modley, R. (1952). Pictographs and graphs; : how to make and use them. New York,: Harper & Brothers.

Chicago

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