APA

Dietrich W., Wagner W. L., . (1988). Systematics of Oenothera section oenothera subsection raimannia and subsection nutantigemma (onagraceae). Michigan, United States: The American Society of Plant Taxonomists.

Chicago

Dietrich Werner, Wagner Warren L, . 1988. Systematics of Oenothera section oenothera subsection raimannia and subsection nutantigemma (onagraceae). Michigan, United States: The American Society of Plant Taxonomists.

Harvard

Dietrich W., Wagner W. L., . (1988). Systematics of Oenothera section oenothera subsection raimannia and subsection nutantigemma (onagraceae). Michigan, United States: The American Society of Plant Taxonomists.

MLA

Dietrich Werner, Wagner Warren L, . Systematics of Oenothera section oenothera subsection raimannia and subsection nutantigemma (onagraceae). Michigan, United States: The American Society of Plant Taxonomists. 1988.