APA (7th ed.) Citation

Hollick, C. A., & Martin, G. C. (1930). The upper cretaceous floras of Alaska. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Hollick, Charles Arthur, and G. C. Martin. The Upper Cretaceous Floras of Alaska. Washington: Gov. Print. Off, 1930.

MLA (9th ed.) Citation

Hollick, Charles Arthur, and G. C. Martin. The Upper Cretaceous Floras of Alaska. Gov. Print. Off, 1930.