Dyfyniad APA

George, W. H., Goldberg, D., Owen, G., Naftalin, L., Pennington, G. W., Sewell, P., & Worthy, E. (1975). Letter: Consultant contract.

Dyfyniad Arddull Chicago

George, W H., D. Goldberg, G. Owen, L. Naftalin, G W. Pennington, P. Sewell, and E. Worthy. Letter: Consultant Contract. 1975.

Dyfyniad MLA

George, W H., et al. Letter: Consultant Contract. 1975.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.