APA (7th ed.) Zitazioa
Sanford, D., & Evans, G. (1987). I can say no: A child's book about drug abuse. Multnomah Press.
Chicago Style (17th ed.) Zitazioa
Sanford, Doris, eta Graci Evans. I Can Say No: A Child's Book About Drug Abuse. Portland, Or.: Multnomah Press, 1987.
MLA (9th ed.) Zitazioa
Sanford, Doris, eta Graci Evans. I Can Say No: A Child's Book About Drug Abuse. Multnomah Press, 1987.
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