APA (7a ed.)

Grobman, A., Bonavia, D., Kelley, D. H., Mangelsdorf, P. C., Mangelsdorf, P. C., & Cámara-Hernández, J. (1977). Study of pre-ceramic maize from huarmey, north central coast of Peru / Alexander Grobman ; Duccio Bonavia ; David H. Kelley ...[et al.]. Botanical Museum Leaflets, 25(8).