Preßler, E. (1992). Tree-ring width of Abies alba from historical object sample 2139B/15A, Netherlands, Groningen. PANGAEA.
Citazione stile Chigago Style (17a edizione)Preßler, Erhard. Tree-ring Width of Abies Alba from Historical Object Sample 2139B/15A, Netherlands, Groningen. PANGAEA, 1992.
Citatione MLA (9a ed.)Preßler, Erhard. Tree-ring Width of Abies Alba from Historical Object Sample 2139B/15A, Netherlands, Groningen. PANGAEA, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.