APA (7e ed.) Bronvermelding

Howard, B. C., & Higgins, R. (1939). On the trail with Lewis and Clark. Silver Burdett Co..

Chicago (17e ed.) Bronvermelding

Howard, Bonnie C., en Ruth Higgins. On the Trail with Lewis and Clark. New York: Silver Burdett Co., 1939.

MLA (8e ed.) Bronvermelding

Howard, Bonnie C., en Ruth Higgins. On the Trail with Lewis and Clark. Silver Burdett Co., 1939.