Citazione Stile APA (7a Edizione)

Hanson, R. D., & Degenkolb, H. J. (1969). The Venezuela earthquake, July 29, 1967. American Iron and Steel Institute.

Citazione stile Chigago Style (17a edizione)

Hanson, Robert D., e Henry J. Degenkolb. The Venezuela Earthquake, July 29, 1967. New York: American Iron and Steel Institute, 1969.

Citatione MLA (8a ed.)

Hanson, Robert D., e Henry J. Degenkolb. The Venezuela Earthquake, July 29, 1967. American Iron and Steel Institute, 1969.