APA

MacKevett E. M., Robertson E. C. & Winkler G. R. (1974). Geology of the Skagway B-3 and B-4 quadrangles, southeastern Alaska. Washington, D.C: U.S. Gov. Print. Off.

Chicago

MacKevett E M, Robertson Eugene C and Winkler G R. 1974. Geology of the Skagway B-3 and B-4 quadrangles, southeastern Alaska. Washington, D.C: U.S. Gov. Print. Off.

Harvard

MacKevett E. M., Robertson E. C. and Winkler G. R. (1974). Geology of the Skagway B-3 and B-4 quadrangles, southeastern Alaska. Washington, D.C: U.S. Gov. Print. Off.

MLA

MacKevett E M, Robertson Eugene C and Winkler G R. Geology of the Skagway B-3 and B-4 quadrangles, southeastern Alaska. Washington, D.C: U.S. Gov. Print. Off. 1974.