APA (7th ed.) Citation

Ayad, . G., Toll, . J., & Esquinas-Alcazar, . J. T. (1980). Directory of germplasm collections: III Cereals. International Board for Plant Genetic Resources Secretariat.

Chicago Style (17th ed.) Citation

Ayad, G., Jane Toll, and J. T. Esquinas-Alcazar. Directory of Germplasm Collections: III Cereals. Rome: International Board for Plant Genetic Resources Secretariat, 1980.

MLA (9th ed.) Citation

Ayad, G., et al. Directory of Germplasm Collections: III Cereals. International Board for Plant Genetic Resources Secretariat, 1980.