APA
(1987). Introducing research results into practice: proceedings of bilateral Bulgarian and American seminar on the introducing research into practice. Bulgaria: Bulgarian Academy of Sciences.
Chicago
1987. Introducing research results into practice: proceedings of bilateral Bulgarian and American seminar on the introducing research into practice. Bulgaria: Bulgarian Academy of Sciences.
Harvard
(1987). Introducing research results into practice: proceedings of bilateral Bulgarian and American seminar on the introducing research into practice. Bulgaria: Bulgarian Academy of Sciences.
MLA
Introducing research results into practice: proceedings of bilateral Bulgarian and American seminar on the introducing research into practice. Bulgaria: Bulgarian Academy of Sciences. 1987.