Ensing, K. (1984). Bioanalysis of Anticholinergics with muscarinic receptors in relation with chronic obstructive lung diseases. Rijksuniversiteit te Groningen.
Chicago-referens (17:e uppl.)Ensing, Kornelis. Bioanalysis of Anticholinergics with Muscarinic Receptors in Relation with Chronic Obstructive Lung Diseases. Netherlands: Rijksuniversiteit te Groningen, 1984.
MLA-referens (8:e uppl.)Ensing, Kornelis. Bioanalysis of Anticholinergics with Muscarinic Receptors in Relation with Chronic Obstructive Lung Diseases. Rijksuniversiteit te Groningen, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.