APA (7th ed.) Citation
(1989). XXVI Colloguium Spectroscopicum Internationale. Volume V.
Chicago Style (17th ed.) Citation
XXVI Colloguium Spectroscopicum Internationale. Volume V. Sofia, 1989.
MLA (9th ed.) Citation
XXVI Colloguium Spectroscopicum Internationale. Volume V. 1989.
Warning: These citations may not always be 100% accurate.