Dyfyniad APA
Simmons, S. (1977). Drawing: The creative process. Prentice-Hall.
Dyfyniad Arddull Chicago
Simmons, Seymour. Drawing: The Creative Process. New Jersey: Prentice-Hall, 1977.
Dyfyniad MLA
Simmons, Seymour. Drawing: The Creative Process. Prentice-Hall, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.