Wotzkow, H. (1967). The art of hand-lettering: Its mastery and practice. Dover.
Chicago-čujuhus (17. p.)Wotzkow, Helm. The Art of Hand-lettering: Its Mastery and Practice. Nueva York: Dover, 1967.
MLA-čujuhus (9. p.)Wotzkow, Helm. The Art of Hand-lettering: Its Mastery and Practice. Dover, 1967.
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