Gaya APA

Letvin, C., Bridges, S. (1992). Letterhead & Logo Designs 2: creating the corporate image (Pertama). Massachusetts: Rockport Publisers.

Gaya MLA

Letvin, Carolyn., Bridges, Stephen. "Letterhead & Logo Designs 2: creating the corporate image". Pertama Massachusetts: Rockport Publisers, 1992. Text.