Cita APA (7a ed.)

ARNELL, A. (1963). Standard Graphical Symbols. McGraw-Hill.

Cita Chicago Style (17a ed.)

ARNELL, Alvin. Standard Graphical Symbols. McGraw-Hill, 1963.

Cita MLA (8a ed.)

ARNELL, Alvin. Standard Graphical Symbols. McGraw-Hill, 1963.