Gaya APA
havighurst, L., lehman, K, G. (1996).
Letterhead & Logo Design 4 : creating the corporate image .
Massachusetts:
rockport publishers.
Gaya MLA
havighurst, Lynne., lehman, Keren, Gourley.
"Letterhead & Logo Design 4 : creating the corporate image".
Massachusetts:
rockport publishers,
1996.
.