Cita APA (7th ed.)

Wald, G., & Wald, G. . ,. . . a. (1966). Twenty-six afternoons of biology: An introductory laboratory manual, (2nd ed.). Addison-Wesley.

Cita Chicago (17th ed.)

Wald, George, i George ,,,,,[et al.] Wald. Twenty-six Afternoons of Biology: An Introductory Laboratory Manual,. 2nd ed. Reading, Mass: Addison-Wesley, 1966.

Cita MLA (9th ed.)

Wald, George, i George ,,,,,[et al.] Wald. Twenty-six Afternoons of Biology: An Introductory Laboratory Manual,. 2nd ed. Addison-Wesley, 1966.