APA

Gras N. S. B., Larson H. M., . (1939). Casebook in American business history. New York: Appleton-Century-Crofts.

Chicago

Gras Norman Scott Brien, Larson Henrietta Melia, . 1939. Casebook in American business history. New York: Appleton-Century-Crofts.

Harvard

Gras N. S. B., Larson H. M., . (1939). Casebook in American business history. New York: Appleton-Century-Crofts.

MLA

Gras Norman Scott Brien, Larson Henrietta Melia, . Casebook in American business history. New York: Appleton-Century-Crofts. 1939.