APA-referens (7:e uppl.)
Seidl, A. (2009). Early spring: An ecologist and her children wake to a warming world. Beacon Press.
Chicago-referens (17:e uppl.)
Seidl, Amy. Early Spring: An Ecologist and Her Children Wake to a Warming World. Boston: Beacon Press, 2009.
MLA-referens (9:e uppl.)
Seidl, Amy. Early Spring: An Ecologist and Her Children Wake to a Warming World. Beacon Press, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.