APA

Croft K., Brown B. W., . (1966). Science readings for students of english as a second language : with exercises for vocabulary development. Estados Unidos: McGraw-Hill.

Chicago

Croft Kenneth, Brown Billye Walker, . 1966. Science readings for students of english as a second language : with exercises for vocabulary development. Estados Unidos: McGraw-Hill.

Harvard

Croft K., Brown B. W., . (1966). Science readings for students of english as a second language : with exercises for vocabulary development. Estados Unidos: McGraw-Hill.

MLA

Croft Kenneth, Brown Billye Walker, . Science readings for students of english as a second language : with exercises for vocabulary development. Estados Unidos: McGraw-Hill. 1966.