APA
Scottish Intercollegiate Guidelines Network, . (1998). Report on a Recommended Referral Document. Edinburgh: SIGN Secretariat.
Chicago
Scottish Intercollegiate Guidelines Network, . 1998. Report on a Recommended Referral Document. Edinburgh: SIGN Secretariat.
Harvard
Scottish Intercollegiate Guidelines Network, . (1998). Report on a Recommended Referral Document. Edinburgh: SIGN Secretariat.
MLA
Scottish Intercollegiate Guidelines Network, . Report on a Recommended Referral Document. Edinburgh: SIGN Secretariat. 1998.