APA (7e ed.) Bronvermelding
Walters, R. P. (1981). How to be a friend: People want to be friends with... Regal.
Chicago (17e ed.) Bronvermelding
Walters, Richard P. How to Be a Friend: People Want to Be Friends with... Carlifornia: Regal, 1981.
MLA (9e ed.) Bronvermelding
Walters, Richard P. How to Be a Friend: People Want to Be Friends with... Regal, 1981.
Let op: Deze citaties zijn niet altijd 100% accuraat.