Cita APA (7a ed.)

Heimler, C. H., & Neal, C. D. (1979). Principles of science: Book two (4th ed.). Merrill.

Cita Chicago Style (17a ed.)

Heimler, Charles H., y Charles D. Neal. Principles of Science: Book Two. 4th ed. Columbus, OH: Merrill, 1979.

Cita MLA (9a ed.)

Heimler, Charles H., y Charles D. Neal. Principles of Science: Book Two. 4th ed. Merrill, 1979.