Gaya APA

John, V, B., Swanson, C, P. (1978). Geography and earth sciences publication 1968-1972 an author, title ì and subject guide to books reviewed, and an index to the reviews . London: London: Pierian; 1978.

Gaya MLA

John, Van, Balen,., Swanson, Carl, P.. "Geography and earth sciences publication 1968-1972 an author, title ì and subject guide to books reviewed, and an index to the reviews". London: London: Pierian; 1978, 1978. Text.