Gaya APA

Collis, D, J., Montgomery, C, A. (2011). Corporate Strategy : A Resource - Based Approach (Edisi 2). Singapore: McGraw-Hill,.

Gaya MLA

Collis, David, J.., Montgomery, Cynthia, A.. "Corporate Strategy : A Resource - Based Approach". Edisi 2 Singapore: McGraw-Hill,, 2011. Text.