Grigorʹev, V. I., & M︠i︡akishev, G. ︠. (1988). Sily v prirode (Izd. 7., ispr. i dop.). "Nauka," Glav. red. fiziko-matematicheskoĭ lit-ry.
Lua i Stíl Chicago (17ú heag.)Grigorʹev, V. I., agus G. ︠I︡A M︠i︡akishev. Sily V Prirode. Izd. 7., ispr. i dop. Moskva: "Nauka," Glav. red. fiziko-matematicheskoĭ lit-ry, 1988.
Lua MLA (8ú heag.)Grigorʹev, V. I., agus G. ︠I︡A M︠i︡akishev. Sily V Prirode. Izd. 7., ispr. i dop. "Nauka," Glav. red. fiziko-matematicheskoĭ lit-ry, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.