APA

(1970). Protype "The Source": more than 3000 type and lettering styl. New York: Protype.

Chicago

1970. Protype "The Source": more than 3000 type and lettering styl. New York: Protype.

Harvard

(1970). Protype "The Source": more than 3000 type and lettering styl. New York: Protype.

MLA

Protype "The Source": more than 3000 type and lettering styl. New York: Protype. 1970.