APA

Sellers G., . (1977). ELEMENTARY STATISTICS. london: w. b. saunders company.

Chicago

Sellers Gene, . 1977. ELEMENTARY STATISTICS. london: w. b. saunders company.

Harvard

Sellers G., . (1977). ELEMENTARY STATISTICS. london: w. b. saunders company.

MLA

Sellers Gene, . ELEMENTARY STATISTICS. london: w. b. saunders company. 1977.