APA

Weller J. M., . (1960). Stratigraphic principles and practice. New York: Harper.

Chicago

Weller J Marvin, . 1960. Stratigraphic principles and practice. New York: Harper.

Harvard

Weller J. M., . (1960). Stratigraphic principles and practice. New York: Harper.

MLA

Weller J Marvin, . Stratigraphic principles and practice. New York: Harper. 1960.