APA-viite (7. p.)
Bullen, G. N. (Fourth Quarter 1989). Selective Programming. Production and Inventory Management Journal.
Chicago-viite (17. p.)
Bullen, George N. "Selective Programming." Production and Inventory Management Journal Fourth Quarter 1989.
MLA-viite (9. p.)
Bullen, George N. "Selective Programming." Production and Inventory Management Journal, Fourth Quarter 1989.
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