Lawrence, G. 1990 Intl Lens Design Conf. SPIE Digital Library.
Cita Chicago (17th ed.)Lawrence, George. 1990 Intl Lens Design Conf. SPIE Digital Library.
Cita MLA (9th ed.)Lawrence, George. 1990 Intl Lens Design Conf. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.