Severin, T. (1997). The spice islands voyage: The quest for alfred wallace, the man who shared darwin's discovery of evolution p. AUWSF.
Chicago-referens (17:e uppl.)Severin, Tim. The Spice Islands Voyage: The Quest for Alfred Wallace, the Man Who Shared Darwin's Discovery of Evolution P. New York: AUWSF, 1997.
MLA-referens (9:e uppl.)Severin, Tim. The Spice Islands Voyage: The Quest for Alfred Wallace, the Man Who Shared Darwin's Discovery of Evolution P. AUWSF, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.