Gaya APA

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

Gaya MLA

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