APA aipamena

Krutch, J. W., & Landacre, P. (1956). The great chain of life. Boston, MA: Houghton Mifflin.

Chicago Style aipamena

Krutch, Joseph Wood, và Paul Landacre. The Great Chain of Life. Boston, MA: Houghton Mifflin, 1956.

MLA aipamena

Krutch, Joseph Wood, và Paul Landacre. The Great Chain of Life. Boston, MA: Houghton Mifflin, 1956.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.