Gaya APA

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

Gaya MLA

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