Franklin

MLA

Merrill, George P. Directions for Collecting Rocks and for the Preparation of Thin Sections. Washington: Govt. print. off., 1895.

APA

Merrill, G. P. (1895). Directions for collecting rocks and for the preparation of thin sections. Washington: Govt. print. off.

Chicago

Merrill, George P. Directions for Collecting Rocks and for the Preparation of Thin Sections. Washington: Govt. print. off., 1895.