Citazione Stile APA (7a Edizione)

Hildach, E., & Morgan, J. P. (1892). Abschied der vogel, op.14: Passage-bird's farewell. Heinrichshofen's Verlag.

Citazione stile Chigago Style (17a edizione)

Hildach, Eugen, e John P. Morgan. Abschied Der Vogel, Op.14: Passage-bird's Farewell. Magdeburg: Heinrichshofen's Verlag, 1892.

Citatione MLA (9a ed.)

Hildach, Eugen, e John P. Morgan. Abschied Der Vogel, Op.14: Passage-bird's Farewell. Heinrichshofen's Verlag, 1892.