APA (7th ed.) Citation

Bews, J. W., & Aitken, R. D. (1923). Researches on the vegetation of Natal. Gov. Print. and Stationery Off.

Chicago Style (17th ed.) Citation

Bews, John W., and R. D. Aitken. Researches on the Vegetation of Natal. Pretoria: Gov. Print. and Stationery Off, 1923.

MLA (9th ed.) Citation

Bews, John W., and R. D. Aitken. Researches on the Vegetation of Natal. Gov. Print. and Stationery Off, 1923.