APA (7th ed.) Citation

Huber, N. K. (1973). The Portage Lake Volcanics (Middle Keweenawan) on Isle Royale, Michigan. U.S. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Huber, Norman K. The Portage Lake Volcanics (Middle Keweenawan) on Isle Royale, Michigan. Washington, DC: U.S. Gov. Print. Off, 1973.

MLA (9th ed.) Citation

Huber, Norman K. The Portage Lake Volcanics (Middle Keweenawan) on Isle Royale, Michigan. U.S. Gov. Print. Off, 1973.