Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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