Παραπομπή σε μορφή APA (7η εκδ.)

Gustafson, A. F., Ries, H., Guise, C. H., & Hamilton, W. J. (1949). Conservation in the United States: A. F. Gustafson, H. Ries, C. H. Guise, [and] W. J. Hamilton, Jr. Comstock publishing company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gustafson, Axel Ferdinand, Heinrich Ries, Cedric Hay Guise, και William John Hamilton. Conservation in the United States: A. F. Gustafson, H. Ries, C. H. Guise, [and] W. J. Hamilton, Jr. Ithaca, N. Y: Comstock publishing company, 1949.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gustafson, Axel Ferdinand, et al. Conservation in the United States: A. F. Gustafson, H. Ries, C. H. Guise, [and] W. J. Hamilton, Jr. Comstock publishing company, 1949.