Cita APA (7a ed.)

Grönroos, C. (1991). The marketing strategy continuum: Towards a marketing concept for the 1990s. [s.n.].

Cita Chicago Style (17a ed.)

Grönroos, Christian. The Marketing Strategy Continuum: Towards a Marketing Concept for the 1990s. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Grönroos, Christian. The Marketing Strategy Continuum: Towards a Marketing Concept for the 1990s. [s.n.], 1991.