Gaya APA

Swanson, C, P., Pimsleur, P. (NULL). Encounters . San: San Diego: Harcourt Brace Jovanovich; 1980.

Gaya MLA

Swanson, Carl, P.., Pimsleur, Paul. "Encounters". San: San Diego: Harcourt Brace Jovanovich; 1980, NULL. Text.