Petrik, L. (1892). Philipp Reis' Telephon.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoru Kātū Chicago (17th ed.)
Petrik, Leopold. Philipp Reis' Telephon. Triest, 1892.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoro MLA (9th ed.)
Petrik, Leopold. Philipp Reis' Telephon. 1892.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.