APA (7th ed.) Citation

Gray, P. H. (1970). International travel, international trade. Heath Lexington Books.

Chicago Style (17th ed.) Citation

Gray, Peter H. International Travel, International Trade. Lexington, Mass: Heath Lexington Books, 1970.

MLA (9th ed.) Citation

Gray, Peter H. International Travel, International Trade. Heath Lexington Books, 1970.

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