APA (7th ed.) Citation

Gulliver, P., & Gulliver, P. H. (1953). The central Nilo-Hamites. International African Institute.

Chicago Style (17th ed.) Citation

Gulliver, Pamela, and P. H. Gulliver. The Central Nilo-Hamites. London: International African Institute, 1953.

MLA (8th ed.) Citation

Gulliver, Pamela, and P. H. Gulliver. The Central Nilo-Hamites. International African Institute, 1953.