APA (7th ed.) Citation

International Travel Maps, Ujimiya, Y., Tran, D. C., Joyce, L., & ITMB Publishing Ltd. (2014). Puerto Rico & US Virgin Islands, scale 1: 190,000/1:50,000 (6th edition (Puerto Rico), First edition (US Virgin Islands).). ITMB Publishing.

Chicago Style (17th ed.) Citation

International Travel Maps, Yusuke Ujimiya, Dinh Cuong Tran, Lan Joyce, and ITMB Publishing Ltd. Puerto Rico & US Virgin Islands, Scale 1: 190,000/1:50,000. 6th edition (Puerto Rico), First edition (US Virgin Islands). Richmond, BC: ITMB Publishing, 2014.

MLA (8th ed.) Citation

International Travel Maps, et al. Puerto Rico & US Virgin Islands, Scale 1: 190,000/1:50,000. 6th edition (Puerto Rico), First edition (US Virgin Islands). ITMB Publishing, 2014.