APA

Raj D., . (19711972). The design of sample surveys. New York: McGraw-Hill.

Chicago

Raj Des, . 19711972. The design of sample surveys. New York: McGraw-Hill.

Harvard

Raj D., . (19711972). The design of sample surveys. New York: McGraw-Hill.

MLA

Raj Des, . The design of sample surveys. New York: McGraw-Hill. 19711972.