APA (7th ed.) Citation

Smith, J. E., & Sowerby, J. (1792). Spicilegium botanicum .. Typis J. Davis.

Chicago Style (17th ed.) Citation

Smith, James Edward, and James Sowerby. Spicilegium Botanicum .. London: Typis J. Davis, 1792.

MLA (8th ed.) Citation

Smith, James Edward, and James Sowerby. Spicilegium Botanicum .. Typis J. Davis, 1792.