Dyfyniad APA

(1971). American men and women of science: Physical and biogical sciences- a biographical directory (12th ed.). R.R. Bowker.

Dyfyniad Arddull Chicago

American Men and Women of Science: Physical and Biogical Sciences- a Biographical Directory. 12th ed. New York: R.R. Bowker, 1971.

Dyfyniad MLA

American Men and Women of Science: Physical and Biogical Sciences- a Biographical Directory. 12th ed. R.R. Bowker, 1971.

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