Cita APA (7a ed.)

Leeflang, P. S. H., & Mortanges, C. P. d. (1996). An empirical investigation of marketing planning. [s.n.].

Cita Chicago Style (17a ed.)

Leeflang, Peter S. H., y Charles Pahud de Mortanges. An Empirical Investigation of Marketing Planning. [S.l.]: [s.n.], 1996.

Cita MLA (9a ed.)

Leeflang, Peter S. H., y Charles Pahud de Mortanges. An Empirical Investigation of Marketing Planning. [s.n.], 1996.