APA

Geerdink R. B., Kooistra-Sijpersma A., Tiesnitsch J., Kienhuis P. G. & Brinkman U. A. (19991221). Determination of polar pesticides with atmospheric pressure chemical ionisation mass spectrometry-mass spectrometry using methanol and/or acetonitrile for solid-phase desorption and gradient liquid chromatography. : Journal of chromatography. A.

Chicago

Geerdink R B, Kooistra-Sijpersma A, Tiesnitsch J, Kienhuis P G and Brinkman U A. 19991221. Determination of polar pesticides with atmospheric pressure chemical ionisation mass spectrometry-mass spectrometry using methanol and/or acetonitrile for solid-phase desorption and gradient liquid chromatography. : Journal of chromatography. A.

Harvard

Geerdink R. B., Kooistra-Sijpersma A., Tiesnitsch J., Kienhuis P. G. and Brinkman U. A. (19991221). Determination of polar pesticides with atmospheric pressure chemical ionisation mass spectrometry-mass spectrometry using methanol and/or acetonitrile for solid-phase desorption and gradient liquid chromatography. : Journal of chromatography. A.

MLA

Geerdink R B, Kooistra-Sijpersma A, Tiesnitsch J, Kienhuis P G and Brinkman U A. Determination of polar pesticides with atmospheric pressure chemical ionisation mass spectrometry-mass spectrometry using methanol and/or acetonitrile for solid-phase desorption and gradient liquid chromatography. : Journal of chromatography. A. 19991221.