APA
Scottish Intercollegiate Guidelines Network, . (1998). Primary care management of asthma. Edinburgh: SIGN Secretariat.
Chicago
Scottish Intercollegiate Guidelines Network, . 1998. Primary care management of asthma. Edinburgh: SIGN Secretariat.
Harvard
Scottish Intercollegiate Guidelines Network, . (1998). Primary care management of asthma. Edinburgh: SIGN Secretariat.
MLA
Scottish Intercollegiate Guidelines Network, . Primary care management of asthma. Edinburgh: SIGN Secretariat. 1998.