APA način citiranja (7. izdanje)

Hopkins , W. C., & Williams, D. L. (1968). Converting factors for Southern pine products. State University.

Čikaški stil citiranja (17. izdanje)

Hopkins , William C., i David L. Williams. Converting Factors for Southern Pine Products. Louisiana: State University, 1968.

MLA način citiranja (9. izdanje)

Hopkins , William C., i David L. Williams. Converting Factors for Southern Pine Products. State University, 1968.