Wong, H. K., Bernstein, L., & Shevick, E. (1973). Ideas and investigations in science: Life science, teachers manual. Prentice-Hall.
Cita Chicago (17th ed.)Wong, Harry K., Leonard Bernstein, i Edward Shevick. Ideas and Investigations in Science: Life Science, Teachers Manual. Englewood Cliffs, NJ: Prentice-Hall, 1973.
Cita MLA (9th ed.)Wong, Harry K., et al. Ideas and Investigations in Science: Life Science, Teachers Manual. Prentice-Hall, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.