APA

Ritchie J. C., Koivo L. K., . (1975). Postglacial diatom stratigraphy in relation to the recession of Glacial Lake Agassiz. [New York: Academic Press].

Chicago

Ritchie James Cunningham, Koivo Liisa K, . 1975. Postglacial diatom stratigraphy in relation to the recession of Glacial Lake Agassiz. [New York: Academic Press].

Harvard

Ritchie J. C., Koivo L. K., . (1975). Postglacial diatom stratigraphy in relation to the recession of Glacial Lake Agassiz. [New York: Academic Press].

MLA

Ritchie James Cunningham, Koivo Liisa K, . Postglacial diatom stratigraphy in relation to the recession of Glacial Lake Agassiz. [New York: Academic Press]. 1975.