APA (7th ed.) Citation

Engel, C., Hendrickson, M. K., & Rogers, J. H. (1997). Intra-national, intra-continental, and intra-planetary PPP. Board of Governors of the Federal Reserve System.

Chicago Style (17th ed.) Citation

Engel, Charles, Michael K. Hendrickson, and John H. Rogers. Intra-national, Intra-continental, and Intra-planetary PPP. Washington, DC: Board of Governors of the Federal Reserve System, 1997.

MLA (9th ed.) Citation

Engel, Charles, et al. Intra-national, Intra-continental, and Intra-planetary PPP. Board of Governors of the Federal Reserve System, 1997.