APA
Stahl E. G., Persson B. & Prescher F. (1990). Effect of provenance and spacing on stem straightness and number of stems with spike knots in Pinus sylvestris L. -Northern Sweden and countrywide models. Uppsala: Swedish University of Agricultural Sciences.
Chicago
Stahl Erik G, Persson Bengt and Prescher Finnvid. 1990. Effect of provenance and spacing on stem straightness and number of stems with spike knots in Pinus sylvestris L. -Northern Sweden and countrywide models. Uppsala: Swedish University of Agricultural Sciences.
Harvard
Stahl E. G., Persson B. and Prescher F. (1990). Effect of provenance and spacing on stem straightness and number of stems with spike knots in Pinus sylvestris L. -Northern Sweden and countrywide models. Uppsala: Swedish University of Agricultural Sciences.
MLA
Stahl Erik G, Persson Bengt and Prescher Finnvid. Effect of provenance and spacing on stem straightness and number of stems with spike knots in Pinus sylvestris L. -Northern Sweden and countrywide models. Uppsala: Swedish University of Agricultural Sciences. 1990.
SerieJęzyk: angielski Serie: Studia Forestalia Suecica - Swedish University of Agricultural Sciences ; Z. 184Szczegóły wydania: Uppsala : Swedish University of Agricultural Sciences, 1990.Opis: 16 s. : il. , tab. , wykr. ; 25 cm.ISBN: 
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