Pettigrew, T. F. (1996). How to think like a social scientist. Longman.
Dyfyniad Arddull ChicagoPettigrew, Thomas F. How to Think like a Social Scientist. New York: Longman, 1996.
Dyfyniad MLAPettigrew, Thomas F. How to Think like a Social Scientist. Longman, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.