APA

Pan American Health Organization, World Health Organization, . (1971). International conference on the application of vaccines against viral, rickettsial and bacterial diseases of man 14-18 december 1970: scientific publication No.226. Washington: Pan American Health Organization.

Chicago

Pan American Health Organization, World Health Organization, . 1971. International conference on the application of vaccines against viral, rickettsial and bacterial diseases of man 14-18 december 1970: scientific publication No.226. Washington: Pan American Health Organization.

Harvard

Pan American Health Organization, World Health Organization, . (1971). International conference on the application of vaccines against viral, rickettsial and bacterial diseases of man 14-18 december 1970: scientific publication No.226. Washington: Pan American Health Organization.

MLA

Pan American Health Organization, World Health Organization, . International conference on the application of vaccines against viral, rickettsial and bacterial diseases of man 14-18 december 1970: scientific publication No.226. Washington: Pan American Health Organization. 1971.