APA (7th ed.) Citation

Robson, G. C. (1928). The species problem: An introduction to the study of evolutionary divergence in natural populations. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Robson, G. C. The Species Problem: An Introduction to the Study of Evolutionary Divergence in Natural Populations. Edinburgh, London: Oliver and Boyd, 1928.

MLA (9th ed.) Citation

Robson, G. C. The Species Problem: An Introduction to the Study of Evolutionary Divergence in Natural Populations. Oliver and Boyd, 1928.

Warning: These citations may not always be 100% accurate.