Dyfyniad APA

Grace, C. O., & Neuhaus, D. (1990). Focus on alcohol. Twenty-first Century Books.

Dyfyniad Arddull Chicago

Grace, Catherine O'Neill, and David Neuhaus. Focus on Alcohol. Frederick, MD: Twenty-first Century Books, 1990.

Dyfyniad MLA

Grace, Catherine O'Neill, and David Neuhaus. Focus on Alcohol. Twenty-first Century Books, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.