Gaya APA

Winkler, A, C., Ray, I, M, J. (NULL). Writing the research paper with both the MLA and APA documentation ì styles . San: San Diego: Harcourt Brace Jovanovich; 1989..

Gaya MLA

Winkler, Anthony, C.., Ray, I., McCuen,, Jo. "Writing the research paper with both the MLA and APA documentation ì styles". San: San Diego: Harcourt Brace Jovanovich; 1989., NULL. Text.