Cita APA (7a ed.)

Copeland, D. (2014). Build awesome command-line applications in Ruby 2: Control your computer, simplify your life. Pragmatic Programmers.

Cita Chicago Style (17a ed.)

Copeland, David. Build Awesome Command-line Applications in Ruby 2: Control Your Computer, Simplify Your Life. [Frisco, TX]: Pragmatic Programmers, 2014.

Cita MLA (8a ed.)

Copeland, David. Build Awesome Command-line Applications in Ruby 2: Control Your Computer, Simplify Your Life. Pragmatic Programmers, 2014.