APA

United States, . (1999). Usage and documentation of home oxygen therapy. [Washington, D.C.]: U.S. Dept. of Health and Human Services, Office of Inspector General.

Chicago

United States, . 1999. Usage and documentation of home oxygen therapy. [Washington, D.C.]: U.S. Dept. of Health and Human Services, Office of Inspector General.

Harvard

United States, . (1999). Usage and documentation of home oxygen therapy. [Washington, D.C.]: U.S. Dept. of Health and Human Services, Office of Inspector General.

MLA

United States, . Usage and documentation of home oxygen therapy. [Washington, D.C.]: U.S. Dept. of Health and Human Services, Office of Inspector General. 1999.