Bakker, R. (1966). The emergence of agriculture on the Drenthe Plateau: A palaeobotanical study supported by high-resolution ¹⁴C dating. Rijksuniversiteit te Groningen.
Lua i Stíl Chicago (17ú heag.)Bakker, Ronald. The Emergence of Agriculture on the Drenthe Plateau: A Palaeobotanical Study Supported by High-resolution ¹⁴C Dating. Netherlands: Rijksuniversiteit te Groningen, 1966.
Lua MLA (8ú heag.)Bakker, Ronald. The Emergence of Agriculture on the Drenthe Plateau: A Palaeobotanical Study Supported by High-resolution ¹⁴C Dating. Rijksuniversiteit te Groningen, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.