Cita APA (7a ed.)

Diethelm, W. (1970). Signet, Sinal, Symbol = Embleme, Signal, Symbole = Signet, Sisnal, Symbol (1a. ed.). ABC Verlag.

Cita Chicago Style (17a ed.)

Diethelm, Walter. Signet, Sinal, Symbol = Embleme, Signal, Symbole = Signet, Sisnal, Symbol. 1a. ed. Zurich: ABC Verlag, 1970.

Cita MLA (9a ed.)

Diethelm, Walter. Signet, Sinal, Symbol = Embleme, Signal, Symbole = Signet, Sisnal, Symbol. 1a. ed. ABC Verlag, 1970.