Bruggemann, P., & Calder, J. A. (1953). Botanical investigations in northeast Ellesmere Island, 1951. Zenodo.
Cita Chicago (17th ed.)Bruggemann, P.F, i James A. Calder. Botanical Investigations in Northeast Ellesmere Island, 1951. Zenodo, 1953.
Cita MLA (9th ed.)Bruggemann, P.F, i James A. Calder. Botanical Investigations in Northeast Ellesmere Island, 1951. Zenodo, 1953.
Atenció: Aquestes cites poden no estar 100% correctes.