APA (7th ed.) Citation

Wolff, J. F., & Holden, T. (1990). Julius F. Wolff Jr.'s Lake Superior shipwrecks (2nd expanded ed.). Lake Superior Port Cities.

Chicago Style (17th ed.) Citation

Wolff, Julius Frederic, and Thom Holden. Julius F. Wolff Jr.'s Lake Superior Shipwrecks. 2nd expanded ed. Duluth, Minn.: Lake Superior Port Cities, 1990.

MLA (9th ed.) Citation

Wolff, Julius Frederic, and Thom Holden. Julius F. Wolff Jr.'s Lake Superior Shipwrecks. 2nd expanded ed. Lake Superior Port Cities, 1990.