APA

Schaefer R. T., . (2015). Sociology in modules. Dubuque: McGraw-Hill Education.

Chicago

Schaefer Richard T, . 2015. Sociology in modules. Dubuque: McGraw-Hill Education.

Harvard

Schaefer R. T., . (2015). Sociology in modules. Dubuque: McGraw-Hill Education.

MLA

Schaefer Richard T, . Sociology in modules. Dubuque: McGraw-Hill Education. 2015.