APA (7th ed.) Citation

Hawkes, J. G., Williams, J. T., & Hanson, J. (1976). A bibliography of plant genetic resources. International Board for Plant Genetic Resources.

Chicago Style (17th ed.) Citation

Hawkes, J. G., J. T. Williams, and Jean Hanson. A Bibliography of Plant Genetic Resources. Rome: International Board for Plant Genetic Resources, 1976.

MLA (8th ed.) Citation

Hawkes, J. G., et al. A Bibliography of Plant Genetic Resources. International Board for Plant Genetic Resources, 1976.