Gaya APA

Swanson, C, P., John, V, B. (1978). Geography and earth sciences publications 1973-1975 an author, title ì and subject guide to books reviewed, and an index to the reviewed . London: London: Pierian; 1978.

Gaya MLA

Swanson, Carl, P.., John, Van, Balen,. "Geography and earth sciences publications 1973-1975 an author, title ì and subject guide to books reviewed, and an index to the reviewed". London: London: Pierian; 1978, 1978. Text.