Wald, G., & Wald, G. . ,. . . a. (1966). Twenty-six afternoons of biology: An introductory laboratory manual, (2nd ed.). Addison-Wesley.
Citazione stile Chigago Style (17a edizione)Wald, George, e George ,,,,,[et al.] Wald. Twenty-six Afternoons of Biology: An Introductory Laboratory Manual,. 2nd ed. Reading, Mass: Addison-Wesley, 1966.
Citatione MLA (9a ed.)Wald, George, e George ,,,,,[et al.] Wald. Twenty-six Afternoons of Biology: An Introductory Laboratory Manual,. 2nd ed. Addison-Wesley, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.