APA

Weaver G. G., Bollinger E. W. 1. j. a., . (1949). Visual aids. New York: D. Van Nostrand Co.

Chicago

Weaver Gilbert Grimes, Bollinger Elroy William 1897 jt au, . 1949. Visual aids. New York: D. Van Nostrand Co.

Harvard

Weaver G. G., Bollinger E. W. 1. j. a., . (1949). Visual aids. New York: D. Van Nostrand Co.

MLA

Weaver Gilbert Grimes, Bollinger Elroy William 1897 jt au, . Visual aids. New York: D. Van Nostrand Co. 1949.