Gaya APA

Swanson, C, P., Groninger, L, D. (NULL). Beginning Statistics within a research contaxt . Philadelphia:: Philadelphia: Harper & Row; 1990.

Gaya MLA

Swanson, Carl, P.., Groninger, Lowell, D.. "Beginning Statistics within a research contaxt". Philadelphia:: Philadelphia: Harper & Row; 1990, NULL. Text.