APA استشهاد

Lippitt, V. G. (1975). The National Economic Environment. McGraw-Hill.

استشهاد بنمط شيكاغو

Lippitt, Vernon G. The National Economic Environment. New York: McGraw-Hill, 1975.

MLA استشهاد

Lippitt, Vernon G. The National Economic Environment. McGraw-Hill, 1975.