Cita APA (7a ed.)

Roehl, J. (1998). Evaluation of the Weed and Seed Initiative in the United States, 1994. [Verlag nicht ermittelbar]. https://doi.org/10.3886/ICPSR06789.v1

Cita Chicago Style (17a ed.)

Roehl, Jan. Evaluation of the Weed and Seed Initiative in the United States, 1994. [Erscheinungsort nicht ermittelbar]: [Verlag nicht ermittelbar], 1998. https://doi.org/10.3886/ICPSR06789.v1.

Cita MLA (9a ed.)

Roehl, Jan. Evaluation of the Weed and Seed Initiative in the United States, 1994. [Verlag nicht ermittelbar], 1998. https://doi.org/10.3886/ICPSR06789.v1.