APA (7th ed.) Citation

Lawther, G., Lawther, C., & Trudgill, A. (1991). Learn lettering and calligraphy step-by-step. Macdonald.

Chicago Style (17th ed.) Citation

Lawther, Gail, Christopher Lawther, and Anne Trudgill. Learn Lettering and Calligraphy Step-by-step. London: Macdonald, 1991.

MLA (9th ed.) Citation

Lawther, Gail, et al. Learn Lettering and Calligraphy Step-by-step. Macdonald, 1991.