Dyfyniad APA

Summers, G. J. (1986). The great book of mind teasers & mind puzzlers. Sterling.

Dyfyniad Arddull Chicago

Summers, George J. The Great Book of Mind Teasers & Mind Puzzlers. New York: Sterling, 1986.

Dyfyniad MLA

Summers, George J. The Great Book of Mind Teasers & Mind Puzzlers. Sterling, 1986.

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