APA-čujuhus (7. p.)
Collins, G. R. (1976). How to be a people helper. Vision House Publishers.
Chicago-čujuhus (17. p.)
Collins, Gary R. How to Be a People Helper. Santa Ana, Calif.: Vision House Publishers, 1976.
MLA-čujuhus (9. p.)
Collins, Gary R. How to Be a People Helper. Vision House Publishers, 1976.
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