Cita APA (7a ed.)

HUGGINS, W., & ENTWISLE, D. R. (1968). Introductory systems and design. Blaisdell.

Cita Chicago Style (17a ed.)

HUGGINS, W.H, y Doris R. ENTWISLE. Introductory Systems and Design. Waltham: Blaisdell, 1968.

Cita MLA (9a ed.)

HUGGINS, W.H, y Doris R. ENTWISLE. Introductory Systems and Design. Blaisdell, 1968.