Ensing, K. (1984). Bioanalysis of Anticholinergics with muscarinic receptors in relation with chronic obstructive lung diseases. Rijksuniversiteit te Groningen.
Čikaški stil citiranja (17. izdanje)Ensing, Kornelis. Bioanalysis of Anticholinergics with Muscarinic Receptors in Relation with Chronic Obstructive Lung Diseases. Netherlands: Rijksuniversiteit te Groningen, 1984.
MLA način citiranja (8. izdanje)Ensing, Kornelis. Bioanalysis of Anticholinergics with Muscarinic Receptors in Relation with Chronic Obstructive Lung Diseases. Rijksuniversiteit te Groningen, 1984.
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