APA-referens (7:e uppl.)

Goebel, K., Sachs, J., Garnsey, H. E. F., & Balfour, I. B. (1887). Outlines of classification and special morphology of plants. Clarendon Press.

Chicago-referens (17:e uppl.)

Goebel, K., Julius Sachs, Henry E. F. Garnsey, och Isaac Bayley Balfour. Outlines of Classification and Special Morphology of Plants. Oxford: Clarendon Press, 1887.

MLA-referens (8:e uppl.)

Goebel, K., et al. Outlines of Classification and Special Morphology of Plants. Clarendon Press, 1887.