APA (7th ed.) Citation

Riečanský, I., Haviar, V., & Plachá, Ľ. Changes of the first heart sound and their relation to the function of the left ventricle.

Chicago Style (17th ed.) Citation

Riečanský, Igor, Vladimír Haviar, and Ľ Plachá. Changes of the First Heart Sound and Their Relation to the Function of the Left Ventricle.

MLA (9th ed.) Citation

Riečanský, Igor, et al. Changes of the First Heart Sound and Their Relation to the Function of the Left Ventricle.