MLA

North, Klaus; Varvakis, Gregorio, and Gregorio Varvakis. Competitive Strategies for Small and Medium Enterprises. Springer International Publishing, 2016.

APA

North, G., & Varvakis, G. (2016). Competitive Strategies for Small and Medium Enterprises. Springer International Publishing.

Chicago

North, Klaus; Varvakis, Gregorio, and Gregorio Varvakis. Competitive Strategies for Small and Medium Enterprises. : Springer International Publishing, 2016.