Παραπομπή APA

Hesse, W. H., & Mc Donald, R. L. (1974). Earth and its environment. Dickenson Publishing Company.

Παραπομπή Chicago Style

Hesse, Walter H., και Robert L. Mc Donald. Earth and Its Environment. California: Dickenson Publishing Company, 1974.

Παραπομπή MLA

Hesse, Walter H., και Robert L. Mc Donald. Earth and Its Environment. Dickenson Publishing Company, 1974.