Mary Trahan

Mary Trahan is the author of "Focus on Psychology", "Psychology, Study Guide and Focus on Research", "Psychology" and "Focus on Psychology: a Guide to Mastering Peter Gray's Psychology".

Books by Mary Trahan

Psychology, Study...
Gray, Peter O.
Multiple copy pack: $139.99

Psychology
Gray, Peter
Multiple copy pack: $105.95

Focus on Psycholo...
Gray, Peter O.
Paperback:

Focus on Psycholo...
Trahan, Mary
Paperback: $30.99