Gaya APA
Ritchie, Bob, Marshall, David. (1998).
Information systems in business .
Singapura:
International Thompson Business.
Gaya Chicago
Ritchie, Bob, Marshall, David.
Information systems in business.
Singapura:
International Thompson Business,
1998.
Buku.
Gaya MLA
Ritchie, Bob, Marshall, David.
Information systems in business.
Singapura:
International Thompson Business,
1998.
Buku.
Gaya Turabian
Ritchie, Bob, Marshall, David.
Information systems in business.
Singapura:
International Thompson Business,
1998.
Buku.