Gaya APA
Jeffrey, G, R. (1999).
The Millenium Meltdown: Year 2000 Computer Crisis .
Canada:
Frontier Research Publications, Inc.
Gaya MLA
Jeffrey, Grant, R..
"The Millenium Meltdown: Year 2000 Computer Crisis".
Canada:
Frontier Research Publications, Inc,
1999.
Buku.