APA

Parker S., . (1987). Communications Source Book. New York, USA: McGraw Hill.

Chicago

Parker Sybil, . 1987. Communications Source Book. New York, USA: McGraw Hill.

Harvard

Parker S., . (1987). Communications Source Book. New York, USA: McGraw Hill.

MLA

Parker Sybil, . Communications Source Book. New York, USA: McGraw Hill. 1987.