APA (7th ed.) Citation

Waterhouse, G. M., & Blackwell, E. M. (1954). Key to the species of Phytophthora recorded in the British Isles. Commonwealth Mycological Institute.

Chicago Style (17th ed.) Citation

Waterhouse, Grace M., and Elizabeth Marianne Blackwell. Key to the Species of Phytophthora Recorded in the British Isles. Kew, Surrey: Commonwealth Mycological Institute, 1954.

MLA (9th ed.) Citation

Waterhouse, Grace M., and Elizabeth Marianne Blackwell. Key to the Species of Phytophthora Recorded in the British Isles. Commonwealth Mycological Institute, 1954.