APA استشهاد

Bittel, L. R. (1976). Improving supervisory performance. Mc Graw-Hill.

استشهاد بنمط شيكاغو

Bittel, Lester R. Improving Supervisory Performance. Auckland: Mc Graw-Hill, 1976.

MLA استشهاد

Bittel, Lester R. Improving Supervisory Performance. Mc Graw-Hill, 1976.