APA-viite (7. p.)
Helbig, A., & Perkins, A. (1996). Dictionary of American children's fiction, 1990-1994: Books of recognized merit. Greenwood Press.
Chicago-viite (17. p.)
Helbig, Alethea, ja Agnes Perkins. Dictionary of American Children's Fiction, 1990-1994: Books of Recognized Merit. Westport, Conn.: Greenwood Press, 1996.
MLA-viite (9. p.)
Helbig, Alethea, ja Agnes Perkins. Dictionary of American Children's Fiction, 1990-1994: Books of Recognized Merit. Greenwood Press, 1996.
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