Cita APA (7th ed.)

Pielou, E. C. (2011). The world of northern evergreens (2nd ed.). Comstock Pub. Associates.

Cita Chicago (17th ed.)

Pielou, E. C. The World of Northern Evergreens. 2nd ed. Ithaca: Comstock Pub. Associates, 2011.

Cita MLA (9th ed.)

Pielou, E. C. The World of Northern Evergreens. 2nd ed. Comstock Pub. Associates, 2011.