APA

Behling J. H., Ball S., . (1980). Guidelines for preparation the research proposal. : .

Chicago

Behling John H, Ball Samuel, . 1980. Guidelines for preparation the research proposal. : .

Harvard

Behling J. H., Ball S., . (1980). Guidelines for preparation the research proposal. : .

MLA

Behling John H, Ball Samuel, . Guidelines for preparation the research proposal. : . 1980.