Kiehl, K., & Aamlid, T. S. (2014). Guidelines for native seed production and grassland restoration. Cambridge Scholars Publishing.
Lua i Stíl Chicago (17ú heag.)Kiehl, Kathrin, agus Trygve S. Aamlid. Guidelines for Native Seed Production and Grassland Restoration. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2014.
Lua MLA (9ú heag.)Kiehl, Kathrin, agus Trygve S. Aamlid. Guidelines for Native Seed Production and Grassland Restoration. Cambridge Scholars Publishing, 2014.
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