Dyfyniad APA
Sanford, D., & Evans, G. (1987). I can say no: A child's book about drug abuse. Multnomah Press.
Dyfyniad Arddull Chicago
Sanford, Doris, and Graci Evans. I Can Say No: A Child's Book About Drug Abuse. Portland, Or.: Multnomah Press, 1987.
Dyfyniad MLA
Sanford, Doris, and Graci Evans. I Can Say No: A Child's Book About Drug Abuse. Multnomah Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.