Cita APA (7a ed.)

Shepherd, W., & Galsworthy, G. (1964). Great pioneers of science. Ward Lock & Co.

Cita Chicago Style (17a ed.)

Shepherd, Walter, y Gay Galsworthy. Great Pioneers of Science. London [etc.]: Ward Lock & Co, 1964.

Cita MLA (9a ed.)

Shepherd, Walter, y Gay Galsworthy. Great Pioneers of Science. Ward Lock & Co, 1964.