APA

Pan American Health Organization, . (1967). First international conference on vaccines against viral and rickettsial diseases of man papers presentesd and discussion held washigton, Dandcand,7-11 November 1966: scientific publication no 147. Washington: Pan American Health Organization.

Chicago

Pan American Health Organization, . 1967. First international conference on vaccines against viral and rickettsial diseases of man papers presentesd and discussion held washigton, Dandcand,7-11 November 1966: scientific publication no 147. Washington: Pan American Health Organization.

Harvard

Pan American Health Organization, . (1967). First international conference on vaccines against viral and rickettsial diseases of man papers presentesd and discussion held washigton, Dandcand,7-11 November 1966: scientific publication no 147. Washington: Pan American Health Organization.

MLA

Pan American Health Organization, . First international conference on vaccines against viral and rickettsial diseases of man papers presentesd and discussion held washigton, Dandcand,7-11 November 1966: scientific publication no 147. Washington: Pan American Health Organization. 1967.