APA استشهاد

Bell, W. J. A., & Mather, J. L. A. (1968). Business statistics simplified.

استشهاد بنمط شيكاغو

Bell, W J; Author, و J L; Author Mather. Business Statistics Simplified. London, Heinemann, 1968.

MLA استشهاد

Bell, W J; Author, و J L; Author Mather. Business Statistics Simplified. 1968.