Wiącek, Jarosław. "Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period" Biologia, vol. 61, no. 5, 2006, pp. 593-595. https://doi.org/10.2478/s11756-006-0095-8
Wiącek, J. (2006). Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period. Biologia, 61(5), 593-595. https://doi.org/10.2478/s11756-006-0095-8
Wiącek, J. (2006) Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period. Biologia, Vol. 61 (Issue 5), pp. 593-595. https://doi.org/10.2478/s11756-006-0095-8
Wiącek, Jarosław. "Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period" Biologia 61, no. 5 (2006): 593-595. https://doi.org/10.2478/s11756-006-0095-8
Wiącek J. Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period. Biologia. 2006;61(5): 593-595. https://doi.org/10.2478/s11756-006-0095-8
