Gaya APA

Schroeder, R, G. (1989). operations management; dicision making in the operations unction (3). singapore: Mc Graw-Hill.

Gaya MLA

Schroeder, Roger, G.. "operations management; dicision making in the operations unction". 3 singapore: Mc Graw-Hill, 1989. Kesehatan Masyarakat.