APA (7th ed.) Citation

Lopes, M. I., & Beall, J. a. (1999). Principles underlying subject heading languages (SHLs). K. G. Saur.

Chicago Style (17th ed.) Citation

Lopes, Maria Ines, and Julianne a. Beall. Principles Underlying Subject Heading Languages (SHLs). München: K. G. Saur, 1999.

MLA (9th ed.) Citation

Lopes, Maria Ines, and Julianne a. Beall. Principles Underlying Subject Heading Languages (SHLs). K. G. Saur, 1999.

Warning: These citations may not always be 100% accurate.