Cita APA

(1939). Vol. 17, № 10 (Vol. 31, № 20). 1939.

Citación estilo Chicago

Vol. 17, № 10 (Vol. 31, № 20). 1939, 1939.

Cita MLA

Vol. 17, № 10 (Vol. 31, № 20). 1939, 1939.

Warning: These citations may not always be 100% accurate.