APA引文

Lewis, D. (1984). Pencil drawing techniques. Watson-Guptill Publications.

Chicago Style (17th ed.) Citation

Lewis, David. Pencil Drawing Techniques. New York: Watson-Guptill Publications, 1984.

MLA引文

Lewis, David. Pencil Drawing Techniques. Watson-Guptill Publications, 1984.

警告：這些引文格式不一定是100％准確.