APA (7th ed.) Citation

Gibberd, A. V., & Gibberd, V. L. (1959). A gardening notebook for the Tropics (2nd ed.). Longman.

Chicago Style (17th ed.) Citation

Gibberd, A. V., and V. L. Gibberd. A Gardening Notebook for the Tropics. 2nd ed. London: Longman, 1959.

MLA (9th ed.) Citation

Gibberd, A. V., and V. L. Gibberd. A Gardening Notebook for the Tropics. 2nd ed. Longman, 1959.