Gaya APA

Friedl, A, E., V., I, K, F. (). Modern physical science exercises and investigations . New: New York: Holt, Rinehart and Winston; 1983.

Gaya MLA

Friedl, Alfred, E.., V., I., Kitko,, Frank. "Modern physical science exercises and investigations". New: New York: Holt, Rinehart and Winston; 1983, . Text.