Baumslag, G. (1963). A Universal Approach to Groups and Rings. New York: New York University.
Dyfyniad Arddull ChicagoBaumslag, Gilbert. A Universal Approach to Groups and Rings. New York: New York University, 1963.
Dyfyniad MLABaumslag, Gilbert. A Universal Approach to Groups and Rings. New York: New York University, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.