Gaya APA

Swanson, C, P., Lindgren, H. (1972). Recreational problems in geometric dissections & how to solve them . New York: New York: Dover; 1972.

Gaya MLA

Swanson, Carl, P.., Lindgren, Harry. "Recreational problems in geometric dissections & how to solve them". New York: New York: Dover; 1972, 1972. Text.