Larsen, H. (1968). Trail Creek: Final report on the excavation of two caves on Seward Peninsula, Alaska. [s.n.].
Cita Chicago Style (17a ed.)Larsen, Helge. Trail Creek: Final Report on the Excavation of Two Caves on Seward Peninsula, Alaska. [S.l.]: [s.n.], 1968.
Cita MLA (9a ed.)Larsen, Helge. Trail Creek: Final Report on the Excavation of Two Caves on Seward Peninsula, Alaska. [s.n.], 1968.
Precaución: Estas citas no son 100% exactas.