Cita APA (7a ed.)

Main, M., & Tittel, E. (2004). HTI+. Que Certification.

Cita Chicago Style (17a ed.)

Main, Max, y Ed Tittel. HTI+. [Indianapolis, Ind.]: Que Certification, 2004.

Cita MLA (8a ed.)

Main, Max, y Ed Tittel. HTI+. Que Certification, 2004.