Citação norma APA

Eckert, Lyons, & Strevell. (1950). Directed Experiments in Chemistry. College Entrance Book Company.

Citação norma Chicago

Eckert, Lyons, and Strevell. Directed Experiments in Chemistry. New York: College Entrance Book Company, 1950.

Citação norma MLA

Eckert, et al. Directed Experiments in Chemistry. College Entrance Book Company, 1950.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.