National Centre for Information and Documentation (Bulgaria). (2005). Advances in Bulgarian science. National Centre for Information and Documentation.
Style de citation Chicago (17e éd.)National Centre for Information and Documentation (Bulgaria). Advances in Bulgarian Science. Sofia: National Centre for Information and Documentation, 2005.
Style de citation MLA (9e éd.)National Centre for Information and Documentation (Bulgaria). Advances in Bulgarian Science. National Centre for Information and Documentation, 2005.
Attention : ces citations peuvent ne pas être correctes à 100%.