Bruno, L. C., & Olendorf, D. (1997). Science & technology firsts. Gale Research.
Cita Chicago (17th ed.)Bruno, Leonard C., i Donna Olendorf. Science & Technology Firsts. Detroit: Gale Research, 1997.
Cita MLA (9th ed.)Bruno, Leonard C., i Donna Olendorf. Science & Technology Firsts. Gale Research, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.