APA (7th ed.) Citation

Kruk, J., & Szymańska, R. Occurrence and distribution of Centaurea jacea subsp. angustifolia Gremli (Asteraceae) in Poland.

Chicago Style (17th ed.) Citation

Kruk, Jerzy, and Renáta Szymańska. Occurrence and Distribution of Centaurea Jacea Subsp. Angustifolia Gremli (Asteraceae) in Poland.

MLA (9th ed.) Citation

Kruk, Jerzy, and Renáta Szymańska. Occurrence and Distribution of Centaurea Jacea Subsp. Angustifolia Gremli (Asteraceae) in Poland.

Warning: These citations may not always be 100% accurate.