APA

Yin Robert K,, . (1994). Case study research : Design and methods. New Delhi: Sage Publications.

Chicago

Yin Robert K,, . 1994. Case study research : Design and methods. New Delhi: Sage Publications.

Harvard

Yin Robert K,, . (1994). Case study research : Design and methods. New Delhi: Sage Publications.

MLA

Yin Robert K,, . Case study research : Design and methods. New Delhi: Sage Publications. 1994.